drivers/ata/dwc_ahci.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * DWC SATA platform driver
   4  *
   5  * (C) Copyright 2016
   6  *     Texas Instruments Incorporated, <www.ti.com>
   7  *
   8  * Author: Mugunthan V N <[email protected]>
   9  */
  10
  11 #include <dm.h>
  12 #include <ahci.h>
  13 #include <scsi.h>
  14 #include <sata.h>
  15 #ifdef CONFIG_ARCH_OMAP2PLUS
  16 #include <asm/arch/sata.h>
  17 #endif
  18 #include <asm/io.h>
  19 #include <generic-phy.h>
  20 #include <linux/printk.h>
  21
  22 struct dwc_ahci_priv {
  23         void *base;
  24         void *wrapper_base;
  25 };
  26
  27 static int dwc_ahci_bind(struct udevice *dev)
  28 {
  29         struct udevice *scsi_dev;
  30
  31         return ahci_bind_scsi(dev, &scsi_dev);
  32 }
  33
  34 static int dwc_ahci_of_to_plat(struct udevice *dev)
  35 {
  36         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  37         fdt_addr_t addr;
  38
  39         priv->base = map_physmem(dev_read_addr(dev), sizeof(void *),
  40                                  MAP_NOCACHE);
  41
  42         addr = devfdt_get_addr_index(dev, 1);
  43         if (addr != FDT_ADDR_T_NONE) {
  44                 priv->wrapper_base = map_physmem(addr, sizeof(void *),
  45                                                  MAP_NOCACHE);
  46         } else {
  47                 priv->wrapper_base = NULL;
  48         }
  49
  50         return 0;
  51 }
  52
  53 static int dwc_ahci_probe(struct udevice *dev)
  54 {
  55         struct dwc_ahci_priv *priv = dev_get_priv(dev);
  56         int ret;
  57         struct phy phy;
  58
  59         ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
  60         if (ret) {
  61                 pr_err("can't get the phy from DT\n");
  62                 return ret;
  63         }
  64
  65         ret = generic_phy_init(&phy);
  66         if (ret) {
  67                 pr_debug("unable to initialize the sata phy\n");
  68                 return ret;
  69         }
  70
  71         ret = generic_phy_power_on(&phy);
  72         if (ret) {
  73                 pr_debug("unable to power on the sata phy\n");
  74                 return ret;
  75         }
  76
  77 #ifdef CONFIG_ARCH_OMAP2PLUS
  78         if (priv->wrapper_base) {
  79                 u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
  80
  81                 /* Enable SATA module, No Idle, No Standby */
  82                 writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
  83         }
  84 #endif
  85
  86         return ahci_probe_scsi(dev, (ulong)priv->base);
  87 }
  88
  89 static const struct udevice_id dwc_ahci_ids[] = {
  90         { .compatible = "snps,dwc-ahci" },
  91         { }
  92 };
  93
  94 U_BOOT_DRIVER(dwc_ahci) = {
  95         .name   = "dwc_ahci",
  96         .id     = UCLASS_AHCI,
  97         .of_match = dwc_ahci_ids,
  98         .bind   = dwc_ahci_bind,
  99         .of_to_plat = dwc_ahci_of_to_plat,
 100         .ops    = &scsi_ops,
 101         .probe  = dwc_ahci_probe,
 102         .priv_auto      = sizeof(struct dwc_ahci_priv),
 103 };